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Outline
After lead-zinc separation in a lead-zinc concentrator, the sulfur concentrate produced from the sulfur flotation process is rich in gold and silver. To further improve the pricing coefficient of gold and silver in the sulfur concentrate, mineral processing research was carried out on the pressure-filtered sample of the sulfur concentrate. Mechanical reagent removal by grinding was adopted to eliminate the adverse effect of residual collector on flotation and improve the liberation between gold and silver minerals and sulfur minerals. In combination of a sulfur depressant consisting of sodium sulfide and sodium humate and 25# aerofloat collector, effective separation and mutual enrichment of gold and silver minerals and sulfur minerals were actualized, and an independent high gold and silver concentrate product was also produced with an Au grade of more than 15 g/t and an Ag grade of more than 200 g/t. Meanwhile, a part of lead and zinc lost in the sulfur concentrate was recovered synchronously, with the total grade of Pb and Zn exceeding 7%. This processing technique not only optimizes the product structure and improves the value realization rate of metallic minerals, but also brings good economic benefits, which is of reference significance.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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